CN219620923U - Ammonia distillation condensing device for ammonium sulfate working section - Google Patents
Ammonia distillation condensing device for ammonium sulfate working section Download PDFInfo
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- CN219620923U CN219620923U CN202320160820.1U CN202320160820U CN219620923U CN 219620923 U CN219620923 U CN 219620923U CN 202320160820 U CN202320160820 U CN 202320160820U CN 219620923 U CN219620923 U CN 219620923U
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Abstract
The utility model belongs to the technical field of cooling, and relates to an ammonia distillation condensing device of an ammonium sulfate working section, which comprises an ammonia distillation tower, a separator, a partition plate and a condensing cooler; the separator is positioned above the ammonia distillation tower, the bottom of the separator is communicated with the top of the ammonia distillation tower to form a whole, and the partition plate is arranged on the cross section in the ammonia distillation tower; the baffle plate is connected with the inner wall of the ammonia still, the baffle plate divides the ammonia still into an upper chamber and a lower chamber, and the upper chamber is communicated with the lower chamber through the baffle plate; the side wall of the upper chamber is provided with a second gas phase outlet, and the side wall of the lower chamber is provided with a first gas phase outlet; the first gas phase outlet is communicated with the top of the separator, the condensation cooler is positioned at the outer side part of the ammonia still, and the second gas phase outlet is communicated with the condensation cooler. According to the ammonia distillation condensing device for the ammonium sulfate working section, the pressure at the top of the tower is reduced, the ammonia nitrogen content in wastewater is reduced, and the quality of ammonia water product is improved.
Description
Technical Field
The utility model belongs to the technical field of cooling, and relates to an ammonia distillation condensing device for an ammonium sulfate working section.
Background
The residual ammonia water generated in the coking process enters a residual ammonia water tank, the ammonia water from the residual ammonia water tank is pumped by a residual ammonia water pump to remove impurities such as tar and the like, then enters a waste water heat exchanger to exchange heat with ammonia distillation waste water discharged from the bottom of the ammonia distillation tower, and then enters the tower from a twentieth layer tower tray of the ammonia distillation tower after being fully mixed with alkali metering pump in an alkali adding mixer, the tower bottom is directly steamed and steamed for blowing, the deaminated waste water is discharged from the tower bottom and is sent to the waste water tank by circulating water after being subjected to heat exchange by the waste water heat exchanger, and the waste water pump is started to carry out biochemical treatment after the liquid level of the waste water tank reaches a certain value. After the ammonia-containing steam at the top of the tower is cooled by a separator, the liquid flows back to the ammonia distillation tower, and the ammonia steam is condensed into ammonia water by a condensing cooler, so as to recycle the ammonia water product.
The existing ammonia still has the following problems during operation: (1) In the ammonia distillation process of the ammonia distillation tower, ammonia vapor enters a separator at the top of the ammonia distillation tower from bottom to top, condensate is generated due to condensation of the ammonia vapor, an ammonia vapor channel of the separator can be reduced, the pressure at the top of the ammonia distillation tower is increased to be up to 0.16MPa, and the operation of the ammonia distillation tower is influenced; (2) Because the channel of the ammonia distillation tower top separator is reduced, the resistance of the separator is increased, the pressure at the top of the ammonia distillation tower is higher, ammonia vapor in the ammonia distillation tower is not sent to a subsequent unit in time, and is largely dissolved in condensate of the separator and finally enters into wastewater at the bottom of the ammonia distillation tower along with the decline of the condensate, so that the ammonia nitrogen in the ammonia distillation wastewater exceeds the standard; (3) In the existing ammonia distillation process, the original matched pipeline of the condensation cooler is DN40, and the pipeline is too thin, so that serious blockage occurs in the ammonia water condensation process, the resistance of an ammonia distillation system is increased, the pressure at the top of the ammonia distillation tower is increased, and the stable operation of the system is influenced.
Disclosure of Invention
Aiming at the technical problems of high pressure in the existing ammonium sulfate working section and exceeding of ammonia nitrogen in wastewater, the utility model provides the ammonia distillation condensing device for the ammonium sulfate working section, which has the advantages of reduced pressure at the top of the tower, reduced ammonia nitrogen content in the wastewater and improved quality of ammonia water product.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
an ammonia distillation condensing device of an ammonium sulfate working section comprises an ammonia distillation tower, a separator, a baffle plate and a condensing cooler; the separator is positioned above the ammonia distillation tower, the bottom of the separator is communicated with the top of the ammonia distillation tower to form a whole, and the partition plate is arranged on the cross section in the ammonia distillation tower; the baffle plate is connected with the inner wall of the ammonia still, the interior of the ammonia still is divided into an upper chamber and a lower chamber from top to bottom by the baffle plate, and the upper chamber is communicated with the lower chamber through the baffle plate; the side wall of the upper chamber is provided with a second gas phase outlet, and the side wall of the lower chamber is provided with a first gas phase outlet; the first gas phase outlet is communicated with the top of the separator, the condensation cooler is positioned at the outer side part of the ammonia distillation tower, and the second gas phase outlet is communicated with the condensation cooler.
Further, the partition plate is a downward convex arc plate.
Further, the partition plate is composed of 8 sector plates with the same structure.
Further, the height of the partition plate is 300mm.
Further, the ammonia distillation condensing device of the ammonium sulfate working section further comprises a down pipe which is arranged in the lower cavity and is positioned below the partition plate, a through hole is arranged at the bottom of the partition plate, and the upper cavity is communicated with the lower cavity through the through hole and the down pipe in sequence.
Further, the downcomer is a U-shaped tube.
Further, the liquid seal height of the downcomer is 300mm.
Further, the bottom of the downcomer is provided with a tear hole.
Further, the diameter of the tear hole is 8mm.
Further, the ammonia distillation condensing device of the ammonium sulfate working section further comprises a condensing pipeline communicated with the condensing cooler, and the inner diameter of the condensing pipeline is 150mm.
The beneficial effects of the utility model are as follows:
1. according to the utility model, a first gas phase outlet and a second gas phase outlet are respectively arranged on the ammonia distillation tower, the first gas phase outlet is communicated with the top of the separator and is communicated with the inside of the ammonia distillation tower through the separator, so that the flow direction of gas phase at the top of the ammonia distillation tower entering the separator is up-in-down-out, the gas phase returns to the ammonia distillation tower after passing through the separator, condensed gas phase is discharged from the bottom of the ammonia distillation tower after being changed into liquid phase, uncondensed gas phase is sent to a condensation cooler from the second gas phase outlet, the pressure at the top of the ammonia distillation tower is reduced to 0.04-0.05 MPa, the system is stable in operation, and the ammonia nitrogen concentration in wastewater discharged in the ammonia distillation process of the final ammonium sulfate section is within the index requirement range, so that the quality of ammonia water can be improved.
2. In the utility model, the baffle plate is arranged in the ammonia distillation tower, the baffle plate divides the ammonia distillation tower into an upper cavity and a lower cavity, meanwhile, the downcomer is arranged below the baffle plate and is U-shaped, so that condensed liquid phase is conveniently led to the liquid receiving disc side of a tray in the ammonia distillation tower, liquid phase discharge is conveniently realized, and the bottom of the downcomer is provided with an 8mm tear hole, so that the liquid phase is conveniently discharged when the ammonia distillation tower is stopped.
3. In the utility model, the partition plate is of a downward convex structure consisting of 8 fan-shaped plates with the same structure, the height of the partition plate is 300mm, and the liquid phase flows well and has good strength.
4. In the utility model, the ammonia distillation condensing device of the ammonium sulfate working section also comprises a condensing pipeline communicated with the condensing cooler, the inner diameter of the condensing pipeline is 150mm, and compared with the inner diameter of the original matched pipe which is 40mm, the pipe diameter is enlarged, so that the condensed liquid is effectively prevented from being condensed to block the pipeline, and the blockage is avoided.
Drawings
FIG. 1 is a schematic diagram of an ammonia still condensing system;
FIG. 2 is a schematic top view of the separator of FIG. 1;
FIG. 3 is an enlarged schematic view of the downcomer of FIG. 1;
wherein:
1-an ammonia distillation tower; 2-a separator; 3-a separator; 4-a downcomer; 5-lacrimal holes; 6-a first gas phase outlet; 7-a second gas phase outlet; 8-a condensing cooler; 9-product tank.
Detailed Description
The utility model will now be described in detail with reference to the drawings and examples.
Referring to fig. 1, an ammonia distillation condensing device for an ammonium sulfate working section comprises an ammonia distillation tower 1, a separator 2, a baffle plate 3 and a condensing cooler 8.
The ammonia still 1 is a cylindrical tower, the middle lower part of the ammonia still 1 is provided with a feed inlet, the bottom is provided with a steam inlet, and the cross section in the ammonia still 1 is provided with a baffle 3; and the baffle plate 3 is connected with the inner wall of the ammonia still 1, the plate surface of the baffle plate 3 is vertical to the axial direction of the ammonia still 1, and the baffle plate 3 divides the interior of the ammonia still 1 into an upper chamber and a lower chamber from top to bottom. The upper chamber communicates with the lower chamber via a partition 3.
The side wall of the ammonia distillation tower 1 is provided with a second gas phase outlet 7, and the side wall of the upper chamber is provided with a first gas phase outlet 6; the first gas phase outlet 6 is communicated with the top of the separator 2, the condensation cooler 8 is positioned at the outer side part of the ammonia distillation tower 1, and the second gas phase outlet 7 is communicated with the condensation cooler 8.
Referring to fig. 1 and 2, the partition plate 3 is a downward convex arc plate, the partition plate 3 is composed of 8 fan-shaped plates with the same structure, the height of the partition plate 3 is 300mm, and specifically, the height is the height distance between the lowest point of the arc plate and the upper surface. In practice, the baffle 3 is welded to the cross section of the ammonia still 1. The bottom of the baffle plate 3 is provided with a through hole, and the upper cavity is communicated with the lower cavity through the through hole.
The separator 2 is of a shell-and-tube structure, the tube side is in a gas phase, and the shell side is in a cooling liquid. The separator 2 is coaxially arranged with the ammonia distillation tower 1, the separator 2 is arranged above the ammonia distillation tower 1, the bottom of the separator 2 is an opening, the bottom of the separator 2 is communicated with the top shell of the ammonia distillation tower 1, and the separator 2 and the ammonia distillation tower 1 form a whole. The top of the separator 2 is provided with an air inlet pipe orifice, and the inner diameter of the pipe orifice is 400mm.
The first gas phase outlet 6 is communicated with an air inlet pipe orifice at the top of the separator 2, and is respectively communicated with the lower chamber and the second gas phase outlet 7 of the ammonia still 1 after downwards passing through the separator 2 and the upper chamber. The first gas phase outlet 6 is a tubular port with an inner diameter of 400mm.
The condensation cooler 8 is positioned at the outer side part of the ammonia distillation tower 1, and the second gas phase outlet 7 is communicated with the condensation cooler 8. The second gas phase outlet 7 is a tubular port with an inner diameter of 200mm. The second gas phase outlet 7 is mainly used for discharging the uncondensed gas after passing through the compressor 2 to a condensation cooler 8 for condensation and recycling nitrogen products.
The ammonia distillation condensing device of the ammonium sulfate working section further comprises a down pipe 4 which is arranged in the lower cavity and is positioned below the partition plate 3, a through hole is arranged at the bottom of the partition plate 3, and the upper cavity is communicated with the lower cavity through the through hole and the down pipe 4 in sequence. Specifically, a downcomer 4 is arranged in a lower chamber in the ammonia still 1, the downcomer 4 is positioned below the baffle plate 3, and after passing through a through hole on the baffle plate 3, an upper chamber is communicated with a tray liquid receiving tray in the lower chamber through the downcomer 4, and mass transfer is continued from the tray liquid receiving tray to the lower chamber of the ammonia still 1.
The ammonia distillation condensing device of the ammonium sulfate working section also comprises a condensing pipeline which is communicated with a condensing cooler 8, and the condensing cooler 8 is communicated with a product tank 9 through the condensing pipeline. The inner diameter of the condensing pipeline is 150mm.
Referring to fig. 1 and 3, the downcomer 4 is a U-shaped tube, the liquid seal height of the downcomer 4 is 300mm, and the inner diameter of the downcomer 4 is 100mm; two openings of the U-shaped pipe are provided with an inlet at one end and an outlet at the other end, the inlet end is positioned right below the through hole and communicated with the through hole, and the outlet end is close to the liquid receiving disc side of the tray, so that condensed liquid is conveniently guided to the liquid receiving disc side of the tray. The bottom of the downcomer 4 is provided with a tear hole 5; the diameter of the tear holes 5 is 8mm. The liquid after condensation can be guided to the liquid receiving disc side of the tray arranged in the ammonia still 1 (lower chamber) by the downcomer 4, the liquid receiving disc of the tray is far away from the orifice of the gas phase, and the condensed liquid phase is discharged when the tear-off holes 5 at the bottom of the downcomer 4 are convenient for stopping.
The working process of the ammonia distillation condensing device of the ammonium sulfate working section provided by the utility model is as follows.
Ammonia water from the residual ammonia water tank is treated by the prior working procedures in sequence (sequentially passes through an ammonia water pump, a coke filter, a waste water heat exchanger and an alkali adding mixer) and then enters an ammonia distillation tower 1, steam (gas phase) enters from the lower part of the ammonia distillation tower 1, and NH in the ammonia water 3 Transferred to the gas phase and contains NH 3 Is discharged from a first gas phase outlet 6 from the top of the separator 2 into the tube side of the separator 2, contains NH 3 Is transferred from top to bottom in the separator 2 and exchanges heat with the cooling liquid entering the shell side of the separator 2, and contains NH under its own weight 3 The condensed liquid and the uncondensed gas phase are separated by gas phase condensation and enter the top (upper chamber) of the ammonia distillation tower 1 downwards, the uncondensed gas phase enters the condensation cooler 8 from the second gas phase outlet 7 to be continuously condensed to obtain condensed liquid (ammonia water), the condensed liquid is recovered in the product tank 9 through a condensation pipeline, and the pipe diameter of the condensation pipeline of the condensation cooler 8 is 3.75 times that of the traditional condensation pipeline, so that the condensed liquid is not easy to block the pipeline, and the stable operation of the system is ensured; condensate in the upper chamber of the ammonia still 1 is guided to the liquid receiving disc side of a tray arranged in the ammonia still 1 (lower chamber) through a baffle plate 3 and a downcomer 4, and is steamed and blown again with the entering steam in the ammonia still 1, so that circulating ammonia distillation is realized, and the quality of ammonia water is improved.
According to the utility model, through transformation, the tower top pressure of the ammonia still 1 is reduced to 0.04-0.05 MPa, and ammonia nitrogen in wastewater discharged from an ammonium sulfate working section also reaches the index requirement range, so that the quality of ammonia water can be improved.
Claims (10)
1. The ammonia distillation condensing device of the ammonium sulfate working section is characterized by comprising an ammonia distillation tower (1), a separator (2), a baffle plate (3) and a condensing cooler (8); the separator (2) is arranged above the ammonia distillation tower (1), the bottom of the separator (2) is communicated with the top of the ammonia distillation tower (1) to form a whole, and the partition plate (3) is arranged on the cross section in the ammonia distillation tower (1); the separator (3) is connected with the inner wall of the ammonia distillation tower (1), the separator (3) divides the interior of the ammonia distillation tower (1) into an upper chamber and a lower chamber from top to bottom, and the upper chamber is communicated with the lower chamber through the separator (3); a second gas phase outlet (7) is formed in the side wall of the upper chamber, and a first gas phase outlet (6) is formed in the side wall of the lower chamber; the first gas phase outlet (6) is communicated with the top of the separator (2), the condensation cooler (8) is positioned at the outer side of the ammonia still (1), and the second gas phase outlet (7) is communicated with the condensation cooler (8).
2. An ammonia distillation condensing device in an ammonium sulfate section according to claim 1 characterized by the fact that the partition (3) is a downwardly convex arcuate plate.
3. An ammonia distillation and condensation device in an ammonium sulphate section according to claim 2 wherein the partition (3) is made up of 8 identical sector plates.
4. A sulphur ammonium station ammonia distillation condensing device according to claim 3, characterized by the fact that the height of the partition (3) is 300mm.
5. An ammonium sulphate section ammonia distillation condensing device according to any one of claims 1-4 further comprising a down-comer (4) disposed in the lower chamber and below the partition (3), the bottom of the partition (3) being provided with a through-hole, the upper chamber being in communication with the lower chamber via the through-hole, the down-comer (4) in sequence.
6. An ammonium sulphate section ammonia still condensing device according to claim 5 characterized by the fact that the downcomer (4) is a U-tube.
7. An ammonium sulphate section ammonia still condensing device according to claim 6 characterized by the fact that the liquid seal height of the downcomer (4) is 300mm.
8. An ammonium sulphate section ammonia still condensing device according to claim 7 characterized by the fact that the bottom of the downcomer (4) is provided with tear holes (5).
9. An ammonium sulphate section ammonia still condensing device according to claim 8 characterised by the fact that the tear holes (5) have a hole diameter of 8mm.
10. An ammonium sulphate section ammonia still condensing device according to claim 9 characterized by the fact that it further comprises a condensing line communicating with the condensing cooler (8), the inner diameter of the condensing line being 150mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320160820.1U CN219620923U (en) | 2023-02-02 | 2023-02-02 | Ammonia distillation condensing device for ammonium sulfate working section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320160820.1U CN219620923U (en) | 2023-02-02 | 2023-02-02 | Ammonia distillation condensing device for ammonium sulfate working section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219620923U true CN219620923U (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320160820.1U Active CN219620923U (en) | 2023-02-02 | 2023-02-02 | Ammonia distillation condensing device for ammonium sulfate working section |
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| Country | Link |
|---|---|
| CN (1) | CN219620923U (en) |
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2023
- 2023-02-02 CN CN202320160820.1U patent/CN219620923U/en active Active
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